How to create a simple web API

Question

gets my request by an 'id' and respond it by returning pdf file from mydatabase coresponding id

Kip Hackman · Answer

From the information that you provided it sounds like you are looking for a document caching system. You can use the LEADTOOLS Document SDK to create your own caching system to store and manage documents. https://www.leadtools.com/help/sdk/dh/to/document-toolkit-and-caching.html Each document will have its own unique identifier that will be used to distinguish between the different documents. public void DocumentIdExample() { var cache = GetCache(); var policy = new CacheItemPolicy(); policy.AbsoluteExpiration = DateTime.Now + new TimeSpan(0, 0, 10); policy.SlidingExpiration = new TimeSpan(0, 0, 10); var options = new LoadDocumentOptions(); options.Cache = cache; options.CachePolicy = policy; string documentId = null; using (var document = DocumentFactory.LoadFromFile(@"C:\LEADTOOLS22\Resources\Images\Leadtools.pdf"), options)) { document.AutoDeleteFromCache = false; documentId = document.DocumentId; document.SaveToCache(); } var loadFromCacheOptions = new LoadFromCacheOptions(); loadFromCacheOptions.Cache = cache; loadFromCacheOptions.DocumentId = documentId; using (var document = DocumentFactory.LoadFromCache(loadFromCacheOptions)) { if (null != document) { document.AutoDeleteFromCache = true;//will be deleted } } } public ObjectCache GetCache() { // Create a LEADTOOLS FileCache object var cacheDir = Path.Combine(@"C:\LEADTOOLS22\Resources\Images\cache"); if (Directory.Exists(cacheDir)) Directory.Delete(cacheDir, true); Directory.CreateDirectory(cacheDir); var cache = new FileCache(); cache.CacheDirectory = cacheDir; return cache; } public void PrintOutDocumentInfo(LEADDocument document) { Console.WriteLine("General"); Console.WriteLine(" DocumentId:" + document.DocumentId); if (document.Uri != null) Console.WriteLine(" Uri:" + document.Uri); Console.WriteLine(" Name:" + document.Name); Console.WriteLine(" CacheStatus:" + document.CacheStatus); Console.WriteLine(" LastCacheSyncTime:" + document.LastCacheSyncTime); Console.WriteLine(" IsReadOnly:" + document.IsReadOnly); Console.WriteLine(" IsLocal:" + document.IsLocal); Console.WriteLine(" MimeType:" + document.MimeType); Console.WriteLine(" IsEncrypted:" + document.IsEncrypted); Console.WriteLine(" IsDecrypted:" + document.IsDecrypted); Console.WriteLine(" UserData:" + document.UserData); Console.WriteLine("Cache"); Console.WriteLine(" HasCache:" + document.HasCache); Console.WriteLine(" AutoDeleteFromCache:" + document.AutoDeleteFromCache); Console.WriteLine("Metadata"); foreach (var item in document.Metadata) Console.WriteLine(" {0} {1}", item.Key, item.Value); Console.WriteLine("Documents"); Console.WriteLine(" Count:" + document.Documents.Count); foreach (var childDocument in document.Documents) { Console.WriteLine(" Name:" + childDocument.Name); } Console.WriteLine("Pages"); Console.WriteLine(" Count:" + document.Pages.Count); for (var pageNumber = 1; pageNumber

Mahesh Chand · Answer

Here are the steps: In your Web API, get data from the database based on an "id" Data is passed to a library that will create the PDF. For this, you will need a PDF creator library PDF then probably should be uploaded to a shared folder or drive This URL can be now passed back to the client to download it Hope it helps!

Anandu G Nath · Answer

Refer Below Article, https://www.c-sharpcorner.com/blogs/consume-web-api-in-asp-net-using-http-client-with-basic-authentication https://www.c-sharpcorner.com/article/introduction-to-asp-net-web-api/ https://dotnettutorials.net/course/asp-net-web-api/ https://www.dotnettricks.com/learn/webapi/content-negotiation-in-asp-net-web-api https://www.youtube.com/watch?v=0pcM6teVdKk

How to create a simple web API

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